The following text is from the original listed building designation:
TQ 65 SW PLAXTOL ROUGHWAY LANE 4/26 (north side)
Oast House and Granary 25 yds north of Roughway Farmhouse GV II
Oast-house and granary. Later C19. Random rubble plinth. Granary of random rubble with red brick above; random rubble extension to south. Plain tiled roof, hipped to south, with small gable at left-hand end of west side and 3 weatherboarded gables to east. Four modern metal casement windows to east. Two blocked doorways in ground floor of granary to west. Three roundels to north, red brick with grey headers, tiled slopes with cowls and wind-vanes. Partially converted into dwelling. Included for group value only.
Listing NGR: TQ6187653001 (1)

A late 18th-early 19th century oasthouse sited to the north of the farmhouse. It has several phases of rebuilding with the granary (stowage) partly of stone rubble, partly English bond brick with blue headers; peg-tile roof. At the south end there is a timber-framed outshut with slate roof. The kilns are of Flemish bond brick with blue headers on stone rubble footings, cogged cournices and peg-tile roofs retaining their cowls. The building was extended in the 1950s or 1960s on the east side, with three projections, all gabled to the east, leaving the east pitch of the original roof of the earlier structure inside the building.

Historic England archive material: BF096219 ROUGHWAY FARM, PLAXTOL

<1> English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.